In familial hypercholesterolemia, individuals who are homozygous for the mutation lack LDL cholesterol receptors in the liver, causing high levels of serum cholesterol
This is a defect in which type of gene pathway: a biosynthetic, signal transduction, or developmental pathway?
signal transduction pathway
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What soil composition would be best for availability of nutrients, water, and root development?
A) equal amounts of sand, clay, and humus B) higher proportion of humus, lower amounts of clay and sand C) higher proportion of clay, lower amounts of humus and sand D) higher proportion of sand, lower amount of humus and clay
Breathing into a paper bag is frequently presented as a remedy for emotional distress in popular culture. Assuming the paper bag chosen is impermeable to atmospheric gases, which of the following is the most likely outcome?
a. The respiratory quotient will increase. b. The partial pressure of oxygen in the lungs will increase. c. The partial pressure of oxygen in the lungs will decrease. d. The respiratory quotient will decrease.
Your lab instructor hands you a root slide and asks you to show her a cell with condensed chromosomes arranged in a straight line. In which section of the root would you begin your search?
A. It doesn't matter; all zones have the same level of mitotic activity. B. Zone of cell division C. Zone of maturation D. Root cap E. Zone of elongation
Proteus species often cause urinary tract infections.
a. true b. false